Dust-collector for polishing-machines.



W. H. (SI (5. W. LEHVIAN.

DUST COLLECTOR FOR POLISHING MACHINES. 7

APPLICATION FILED MAYII. ml.

1 ,267,09 1 Patented May 21,1918.

2 SHEETS-SHEET 1.

. lie/wanton W. H. & G. W. LEIMAN.

DUST COLLECTOR FOR POLISHING MACHINES.

APPLICATION FILED MAY 17. 1917.

Patented May 21,1918.

2 SHEETS-SHEET 2.

Z2wemm= MAW 7/ @144 plane of the line II-Il of Fig. 1, and por- NTTED ATE PAENT @FFTCE.

WILLIAM H. LEIMAN AND GEORGE W. LEIMAN, 0F NEWARK, NEW JERSEY.

DUST-COLLECTOR, FOR POLISHING-MACHINES.

Specification of Letters Eatent.

Patented Ma 21, rats.

Application filed May 17, 1917. Serial No. 169,322.

To all whom it may concern:

Be it known that we, WILLIAM H. LEIMAN and GEORGE W. LEIMAri, citizens of the United States, and residents of Newark, in the county of Essex and State of New Jersey, have invented a new. and useful Improvement in Dust-Collectors for Polishing-Machines, of which the following is a specification.

Our invention consists in a polishing machine having novel means for collecting and saving the dust incident to the operation of the machine.

A practical embodiment of the invention is represented in the accompanying drawings in which,

Figure 1 represents the machine in front elevation certain of the parts being broken away to more clearly illustrate parts behind them.

Fig. 2 is a horizontal section taken in the plane of the line IH-IH of Fig. 1, a portion of the top of the water tank being broken away.

Fig. 3 is a vertical section taken in the tions of one of the dust collecting cabinets, its cage and dust bag being broken away.

Fig. 4 is an enlarged detail section within the cabinet, taken in one plane.

Fig. 5 is an enlarged detail section within the cabinet, taken in a plane at right angles to Fig. 4, and

Fig. 6 is a detail horizontal section taken within the cabinet.

The polishing head 1 is herein shown as provided with two oppositely. arranged spindles 2. The spindles are rotated in the usual manner from any desired source of power, such, for instance, as the electric motor 3, through its shaft 4, pulley 5 and belt 6. Hoods 7 partially inclose the spindles2. These hoods 7 have passageways 8 which extend downwardly through the table 9, into the open mouths of their respective dust bags 10 removably suspended in-cages 11 which are removable from the cabinets 12, through the doors 13. Each cabinet door is preferably locked closed by providing a pair of swinging latch bars 14:, 15, having their outer ends arranged to engage keepers 16, 17 and their inner ends adapted to be secured together by a padlock 18.

Within the cabinet, near its top, we provide angular supporting slide bars 19 for the top frame 20 of the cage 11, from which slide bars19, the cage is suspended and is also removable from the interior of the cabinet by a sliding movement when the door is opened. The dust bag 10 is suspended and its mouth held open by means of a peripheral bar 21 which rests upon the top frame 20 of the cage 11. This construction permits the ready removal and insertion of the dust bag When the cage with its top frame has been withdrawn from the cabinet.

The interiors of the two cabinets are in open communication through a passageway 22, and a passageway 23 leads from the bottom of one of the cabinets to the box 2% of the exhaust fan 25, which fan may be driven from the motor 3.

Means is provided for collecting and saving the finer particles of dust which have been drawn through the meshes of the dust bag 10, which means is herein shown as a removable tank 26 held in position by the swinging latch bars 27, which tank is pro vided with a removable cover 28. A passageway 29 leads from the fan box 24, through the platform 36, on which the motor and fan are mounted, and the tank is provided with an opening 30 in the cover which is brought into register with the passageway 29 when the tank is in position. A packing ring 37 is provided for making a dust-tight joint between the tank and passageway 29. horizontal bafiie plate 31 is provided within the tank 26, just below the opening 30, for directing the air and dust particles toward one end of the tank. At the other end of the tank a hole 32 is brought into communication with the outlet elbow 33 carried by the platform 36.

We also locate within the tank, a series of vertical baffle plates 3 f extending upwardly from a point in close proximity to the bottom of the tank, and between these bafile plates we preferably suspend cloth bafile curtains 35, the bottoms of which are located in close proximity to the bottom of the tank, which baffle plates and curtains are used for preventing the free passage of the fine dust and air through the tank and the curtains for collecting the fine dust thereon. This tank is preferably a water tank with the water level maintained above the bottoms of the bafiie plates 34 and curtains 35. A suitable water filling hole 38 may be provided M0 and cabinet box, the door is provided with a felt peripheral strip 40, the face of the box along its side and bottom edges with a felt strip 39, and the front of the cage frame with a felt strip 41 forming a continuation of the felt strip 39. When the door is closed, the peripheral strip 40 is brought into snug engagement with the strips 39 and 41.

In operation, the suction fan will draw the dust from the hoods 7 down into the interior of the dust bags 10 where the larger particles of dust will be collected. The smaller particles of dust which escape through the fine meshes of the bags 10, will pass down into the tank 26 Where they will be collected.

The dust bags may be very readily removed by unlocking and opening the doors 13, and withdrawing the cages. Similarly, the finer particles of dust which have accumulated in the tank 26, may be saved by removing the tank and lifting its cover.

What we claim is:

1. In a machine of the character described, two suction hoods, two dust collecting cabinets, one for each hood, and a common exhaust fan, passagewaysleading from the suction hoods to their respective cabinets, a passageway leading from one cabinet to the other, and a passageway leading from one cabinet only to the exhaust fan.

2. In a machine of the character described, a suction hood, a dust collecting cabinet communicating therewith, an exhaust fan communicatin with the cabinet, and a horizontally arranged fine dust collecting tank communicating with the exhaust fan beyond its connection with the cabinet.

3. In a machine of the character described, two suction heads, two dust collecting cabinets one for each hood and communicating with each other, an exhaust fan communicating directly with one only of the cabinets and a fine horizontally arranged dust collecting tank communicating with the exhaust fan beyond its connection with its cabinet.

4. In a machine of the character described, two suction hoods, two dust collecting cabinets, one for each hood and communicating with each other, a horizontally arranged fine dust collectin tank, and an exhaust fan communicating directly with one only of said cabinets and with the fine dust collecting tank for drawing the air through the suction hoods and cabinets and forcing it through the said tank.

5. In a machine of the character described, two suction hoods, two dust collecting cabinets, one for each hood and communicating with each other, a removable horizontally arranged fine dust collecting tank, and an exhaust fan communicating directly with one only of said cabinets and with the fine dust collecting tank for drawing the air through the suction hoods and cabinets and forcing it through said tank.

In testimony, that we claim the foregoing as our invention, we have signed our names this second day of May, 1917.

WILLIAM H. LEIMAN. GEURGE W. LEIMAN. 

